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Diseases

Root rots

Root rots are a complex of soil-borne fungal diseases affecting the underground part and the basal zone of plants. The infection manifests latently and leads to a 15–40% reduction in crop productivity.

Mentioned in descriptions 5 232 varieties reference book.

Root rots represent a group of pathologies affecting roots, tillering nodes, and underground internodes. The disease manifests as stand thinning, necrosis and browning of the root system, as well as the appearance of brown spots, streaks, and coatings on the basal part of the stem. External signs are often hidden and masked as nutrient deficiencies or winterkill, which is expressed in plant stunting, stem breakage, empty ears, and shriveled grain.

Disease development depends on a combination of abiotic factors and agronomic conditions. The infection actively progresses under excessive soil moisture, crop rotation violations, monoculture cropping, and the use of infected seed material. Mineral nutrient imbalance, especially potassium and phosphorus deficiency combined with nitrogen excess, reduces the natural immunity of plants, creating favorable conditions for pathogen activity across a wide temperature range.

In breeding practice, resistance to rots is often defined as tolerance—the ability of a plant to maintain productivity when infected. Variety evaluation is conducted on artificial and natural infection nurseries using quantitative disease scales from 1 to 9. Biophysical and conductometric methods are used for rapid analysis of the degree of tissue damage by pathogenic toxins.

Sources10

Breakdown by crop

Root rots — common wheat 125 Root rots of sugar beet 75 Pea Root Rots 73 Tomato root rot 72 Raspberry root rots 55 Root rots — garden strawberry 47 Root rots of lettuce 43 Alfalfa Root Rot 40 Cucumber root rot 40 Tobacco root rots 35 Barley root rots 35 Maize Root Rots 33 Root rots of soybean 29 Root rots — red clover 20 Root rots — Onion 17 Root rots of Calibrachoa 17 Apple root rot 16 Bean root rots 15 Root rots — Onion 13 Root rots — durum wheat 13 Apple Root Rots 11 Root rots of triticale 10 Root rots of subterranean clover 10 Maize root rot 8

Found in these crops

Tomato 573 Sugar beet 141 Onion 136 Bread wheat 119 Onion 119 Garden strawberry 91 Pea 75 Red raspberry 64 Lettuce 60 hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner 58 Soybean 53 Alfalfa 53

Varieties that feature this in their description

Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.

Jubilar

Terminated

Triticum aestivum L. · Bread wheat

SK
1 record

KWS 3K503

Active

Beta vulgaris Sugar Beet Group · Sugar beet

DE
1 record

Gabriëlle

Withdrawn

Aglaonema Schott. · Chinese Evergreen

NL
1 record

Kharkivianyn

Application submitted

Pisum sativum L. · Pea

UA
1 record

Highrave

Protection expired

Beta vulgaris Sugar Beet Group · Sugar beet

NL
1 record

El`santa

Application submitted

Fragaria L. · Strawberry

UA
1 record

HPG

Withdrawn

Solanum lycopersicum L. · Tomato

NL
1 record

Emily

Terminated

Fragaria L. · Strawberry

CZ
1 record

Horus

Active

Solanum lycopersicum L. · Tomato

IT
1 record

Excel 1104

Withdrawn

Allium cepa L. var. cepa · Onion

NL
1 record

Commandor

Terminated

Medicago sativa L. subsp. sativa · Alfalfa

IT
1 record

FD Badminton

Active

Beta vulgaris Sugar Beet Group · Sugar beet

DE
1 record

Etnico

Terminated

Solanum lycopersicum L. · Tomato

IT
1 record

Fado

Protection expired

Solanum lycopersicum L. var. lycopersicum · Tomato

HU
1 record

Burley

Terminated

Nicotiana tabacum L. · Tobacco

SK
1 record

Espina

Application submitted

Solanum melongena L. · Eggplant

HU
1 record

Daytona F1

Protection expired

Allium cepa L. · Onion

Bejo Zaden (NL)

SI
1 record

Blissy

Active

Rubus idaeus L. · Red raspberry

HU
1 record

Drummor

Terminated

Medicago sativa L. subsp. sativa · Alfalfa

IT
1 record

Double Pink

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Ryoji Irie

FR
1 record

Creme Birds

Terminated

Limonium sinuatum (L.) Mill. · Statice

NL
1 record

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